EP1535723A2 - Apparatus for welding multilayered sheets - Google Patents

Apparatus for welding multilayered sheets Download PDF

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Publication number
EP1535723A2
EP1535723A2 EP04025254A EP04025254A EP1535723A2 EP 1535723 A2 EP1535723 A2 EP 1535723A2 EP 04025254 A EP04025254 A EP 04025254A EP 04025254 A EP04025254 A EP 04025254A EP 1535723 A2 EP1535723 A2 EP 1535723A2
Authority
EP
European Patent Office
Prior art keywords
layers
anvil
welding
bag
ultrasonic sonotrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04025254A
Other languages
German (de)
French (fr)
Other versions
EP1535723A3 (en
Inventor
Hartmut Möglich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Herrmann Ultraschalltechnik GmbH and Co KG
Original Assignee
Herrmann Ultraschalltechnik GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Herrmann Ultraschalltechnik GmbH and Co KG filed Critical Herrmann Ultraschalltechnik GmbH and Co KG
Publication of EP1535723A2 publication Critical patent/EP1535723A2/en
Publication of EP1535723A3 publication Critical patent/EP1535723A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
    • B29C66/7311—Thermal properties
    • B29C66/73115—Melting point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/304—Joining through openings in an intermediate part of the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
    • B29C66/7311—Thermal properties
    • B29C66/73115—Melting point
    • B29C66/73116—Melting point of different melting point, i.e. the melting point of one of the parts to be joined being different from the melting point of the other part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B29C66/81429—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/008—Standing pouches, i.e. "Standbeutel"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2305/00—Use of metals, their alloys or their compounds, as reinforcement
    • B29K2305/02—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B29L2009/003—Layered products comprising a metal layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets

Definitions

  • the invention relates to a device for welding of several layers of laminates, with one Ultrasonic sonotrode and an anvil, which is between them take at least three layers of the laminates, wherein at least two of the laminate layers of different heights Have melting points.
  • Laminates are usually used when bends needed, which have different properties have to.
  • Beverage bags used that are airtight, lightproof and tasteless and odorless must be and also should not react with the bag contents.
  • laminates are known, those made of aluminum existing layer, an inner layer attached to it Polyethylene and an outer layer of PET (Polyethylene terephthalate).
  • the inner layer off Polyethylene has the advantage of being neutral with regard to the bag contents, this layer has a melting point in the range of 110 ° C to 120 ° C.
  • the outer layer of PET has a high mechanical Resistance to and possesses a melting point of 180 ° C and higher.
  • the bag is made by that a front and a back layer of such folded laminate cut along its longitudinal sides and their top are welded together, the two layers of polyethylene together issue. Welding the edges of these layers takes place by heat input by means of a heating element, whereby the low-melting polyethylene plasticized and the two are made of polyethylene Connect layers together.
  • the invention is therefore based on the object, a Device to provide, with which in a simple way and also multi-layer laminates can be welded together.
  • the Device is an ultrasonic welding device.
  • the main advantage is achieved that not only the layers of materials with low Melting points can be connected to each other, but also the layers of materials with higher ones Melting points, without the layers of materials with low melting points. Therefore unnecessary especially in the production of soils Tubular bags for drinks in the prior art required punching, so that with the Device according to the invention saved a work step becomes.
  • the anvil of Device is stored elastically. This will avoided that emitted by the sonotrode Ultrasonic energy through the workpiece into the Sonotrode is initiated without this energy Welding causes.
  • the contact surface of the anvil has a Degree of freedom in the direction of vibration of Ultrasonic sonotrode. This means that the contact surface of the anvil at least slightly in the same direction vibrates as the ultrasonic sonotrode, causing the Welding results are significantly improved.
  • the Contact surface of the anvil one degree of freedom perpendicular to the vibration direction of the ultrasonic sonotrode.
  • the anvil can have another Vibrator be stimulated, so this oscillates perpendicular to the ultrasonic sonotrode. Also by this the welding results are improved.
  • the anvil according to the invention is freely cantilevered stored.
  • the rest Anvil on a spring element This will be the possibility created that the anvil is not absolutely rigid, but slightly the movements of the ultrasonic sonotrode can dodge or follow.
  • the tip of the ultrasonic sonotrode a bulge on.
  • the bulge is the Targeted ultrasound energy into several out of several Laying existing laminate initiated so that first the Layer of low melting point material is plasticized.
  • the bulge causes a Displacement of this plasticized material, so that then the material with higher melting point is plasticized. This will prevent too high Energys in the layers from the low-melting Material to be initiated. There is only one Displacement of this material, but no destruction.
  • the invention also relates to an inventive Use of the device for producing one of a Bag existing packaging, especially one Beverage Packaging.
  • a Bag existing packaging especially one Beverage Packaging.
  • beverage packages in particular their soil thereby easier and produced more cost-effectively, that one step, namely the punching in the edge region of the side edges of the Soil can be omitted.
  • the invention further relates to a method for Welding multi-layer laminates where at least two laminate layers are different have high melting points, wherein at least three Laminate layers are welded together and the Laminate layers are superimposed so that the Laminate layers with equally high melting points together abuts, wherein the laminate layers by means of ultrasound be welded together.
  • An inventive method step provides that after plasticizing the material of the layer with low melting point displaced this material as long until the required welding pressure for plasticizing the material of the higher melting point layer prevails. This is done in one operation, as the Layer thicknesses are extremely low and therefore very little Material must be displaced, so the welding pressure even after the displacement of the plasticized material in the remains essentially constant.
  • An alternative provides that the welding pressure during the welding process is increased and / or that the Sonotrode is delivered during the welding process. As a result, the welding results can be improved and / or be selectively changed.
  • the invention also relates to a bag associated with the above said production process has been produced.
  • the reference numeral 10 is a bag denoted by e.g. Drinks are packed can. This bag 10 is along its longitudinal sides 12th and 14 and its top 16 welded. The Bottom is formed by a bottom 18 passing through Folding and protuberance of the blank was formed.
  • the layer 30 is made of a plastic with a melting point in the Range of 180 ° C, e.g. PET (Polyethylene terephthalate).
  • the inner layer forming Layer 34 is also made of plastic, however a lower melting point in the range of 110 ° C to 120 ° C, e.g. PE (polyethylene).
  • PE polyethylene
  • an ultrasonic sonotrode 46 used, which at its top a bulge 48 having. With this ultrasonic sonotrode 46 is first the material of the inner layers 34 and 34 ' plasticized and then displaced. The further Energy input now plasticizes the material of the layers 30 'and 30' ', so that they are connected to each other, the displaced material of layers 34 in FIG. 34 'is not gets destroyed. As a result, all in one operation in the floor area contiguous layers 34, 34 ', 30' and 30 '' interconnected. A punching is needed therefore not more.
  • FIG. 5 shows a bag 10, which after the inventive method has been prepared, ie in its area of the bottom 18 has no punched out, because the longitudinal sides 12 and 14 together by means of ultrasound with the folded portion 38 intimately with each other can be welded.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Making Paper Articles (AREA)
  • Package Closures (AREA)

Abstract

An ultrasonic welding unit with a sonic horn(46) and an anvil(50) is used to weld at least three laminate layers, of which at least two have different melting points. Elastic mounting of the anvil(50), preferably on springs(58), permits the anvil face freedom of movement(52,56) in both the vibration direction(54) and a direction perpendicular(56) to the latter. The tip of the sonic horn has a bulge(48). Independent claims are included for: a) a ultrasonic welding method for welding several laminate layers of which at least two have different, high melting points; b) a bag or pouch produced using the ultrasonic welding method.

Description

Die Erfindung betrifft eine Vorrichtung zum Verschweißen von mehreren Lagen von Laminaten, mit einer Ultraschallsonotrode und einem Amboss, die zwischen sich wenigstens drei Lagen der Laminate aufnehmen, wobei wenigstens zwei der Laminatschichten unterschiedlich hohe Schmelzpunkte aufweisen.The invention relates to a device for welding of several layers of laminates, with one Ultrasonic sonotrode and an anvil, which is between them take at least three layers of the laminates, wherein at least two of the laminate layers of different heights Have melting points.

Laminate werden in der Regel dann verwendet, wenn man Bögen benötigt, die unterschiedliche Eigenschaften aufweisen müssen. In der Getränkeindustrie werden zum Beispiel Getränkebeutel verwendet, die luftdicht, lichtdicht und geschmacks- sowie geruchsneutral sein müssen und außerdem mit dem Beutelinhalt keine Reaktionen eingehen dürfen. Bekannt sind zum Beispiel Laminate, die eine aus Aluminium bestehende Schicht, eine dran befestigte innere Schicht aus Polyethylen und eine äußere Schicht aus PET (Polyethylenterephthalat) aufweisen. Die innere Schicht aus Polyethylen besitzt den Vorteil, dass sie neutral hinsichtlich des Beutelinhalts ist, wobei diese Schicht einen Schmelzpunkt im Bereich von 110°C bis 120°C aufweist. Die äußere Schicht aus PET weist eine hohe mechanische Widerstandsfähigkeit auf und besitzt einen Schmelzpunkt von 180°C und höher. Der Beutel wird dadurch hergestellt, dass eine vordere und eine hintere Lage eines derartig gefalteten Laminatzuschnittes entlang ihrer Längsseiten und ihrer Oberseite miteinander verschweißt werden, wobei die beiden aus Polyethylen bestehenden Schichten aneinander anliegen. Das Verschweißen der Ränder dieser Schichten erfolgt durch Wärmeeintrag mittels eines Heizelementes, wodurch das niedrig schmelzende Polyethylen plastifiziert wird und sich die beiden aus Polyethylen bestehenden Schichten miteinander verbinden.Laminates are usually used when bends needed, which have different properties have to. In the beverage industry, for example Beverage bags used that are airtight, lightproof and tasteless and odorless must be and also should not react with the bag contents. For example, laminates are known, those made of aluminum existing layer, an inner layer attached to it Polyethylene and an outer layer of PET (Polyethylene terephthalate). The inner layer off Polyethylene has the advantage of being neutral with regard to the bag contents, this layer has a melting point in the range of 110 ° C to 120 ° C. The outer layer of PET has a high mechanical Resistance to and possesses a melting point of 180 ° C and higher. The bag is made by that a front and a back layer of such folded laminate cut along its longitudinal sides and their top are welded together, the two layers of polyethylene together issue. Welding the edges of these layers takes place by heat input by means of a heating element, whereby the low-melting polyethylene plasticized and the two are made of polyethylene Connect layers together.

Es sind auch Beutel bekannt, die einen Boden besitzen, so dass sie aufrecht stehen können. Dieser Boden wird dadurch erzeugt, dass der die Vorder- und Rückseite bildende Laminatzuschnitt in seinem Bodenbereich eingeschlagen wird und dann die Längsränder miteinander verschweißt werden. Da der Wärmeeintrag jedoch maximal so groß sein kann, dass die aus Polyethylen bestehende Schicht plastifiziert, erfolgt keine Verbindung der aneinanderliegenden Schichten aus PET, da diese Schichten einen wesentlich höheren Schmelzpunkt aufweisen. Der Boden besteht demnach lediglich aus zwei Bodenlappen, die nicht miteinander verbunden sind. Daher werden in den eingeschlagenen Teil des Bodens im Bereich der Längsränder Ausstanzungen eingebracht, so dass durch die Ausstanzungen hindurch die beiden aus Polyethylen bestehenden Schichten der äußeren Beutelflächen aneinander anliegen. Somit können durch die Ausstanzungen hindurch diese beiden Schichten aus Polyethylen miteinander verschweißt werden. Ein derartiger Beutel ist jedoch aufwändig herzustellen, da zusätzlich zum Schweißvorgang ein Stanzvorgang durchgeführt werden muss.There are also known bags that have a bottom, so that they can stand upright. This soil is thereby produces that of the front and back forming Laminate cut is taken in its bottom area and then the longitudinal edges are welded together. There However, the heat input can be as large as possible that the made of polyethylene existing layer plasticized takes place no connection of the adjacent layers of PET, because these layers have a much higher melting point exhibit. The floor is therefore only two Floor cloths that are not connected to each other. Therefore be in the felled part of the soil in the area the longitudinal edges punched, so that by the punched holes through the two of polyethylene existing layers of outer bag surfaces together issue. Thus, through the punched through these two layers of polyethylene together be welded. However, such a bag is consuming to manufacture, in addition to the welding process a punching process must be performed.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung bereit zu stellen, mit welcher auf einfache Art und Weise auch aus mehreren Lagen bestehende Laminate miteinander verschweißt werden können.The invention is therefore based on the object, a Device to provide, with which in a simple way and also multi-layer laminates can be welded together.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Vorrichtung eine Ultraschallschweißvorrichtung ist.This object is achieved in that the Device is an ultrasonic welding device.

Durch die Verwendung einer Ultraschallschweißvorrichtung zum Verschweißen von aus mehreren Lagen bestehenden Laminaten wird der wesentliche Vorteil erzielt, dass nicht nur die Schichten aus Materialien mit niedrigen Schmelzpunkten miteinander verbunden werden können, sondern auch die Schichten aus Materialien mit höheren Schmelzpunkten, ohne dass die Schichten aus Materialien mit niedrigen Schmelzpunkten Schaden nehmen. Daher erübrigt sich insbesondere bei der Herstellung von Böden an Schlauchbeuteln für Getränke die beim Stand der Technik erforderliche Ausstanzung, so dass mit der erfindungsgemäßen Vorrichtung ein Arbeitsschritt eingespart wird.By using an ultrasonic welding device for welding of several layers Laminates, the main advantage is achieved that not only the layers of materials with low Melting points can be connected to each other, but also the layers of materials with higher ones Melting points, without the layers of materials with low melting points. Therefore unnecessary especially in the production of soils Tubular bags for drinks in the prior art required punching, so that with the Device according to the invention saved a work step becomes.

Bei einer Weiterbildung ist vorgesehen, dass der Amboss der Vorrichtung elastisch gelagert wird. Dadurch wird vermieden, dass die von der Sonotrode abgegebene Ultraschallenergie durch das Werkstück hindurch in die Sonotrode eingeleitet wird, ohne dass diese Energie ein Schweißen verursacht.In a further development, it is provided that the anvil of Device is stored elastically. This will avoided that emitted by the sonotrode Ultrasonic energy through the workpiece into the Sonotrode is initiated without this energy Welding causes.

Mit Vorzug besitzt die Kontaktfläche des Ambosses einen Freiheitsgrad in Schwingungsrichtung der Ultraschallsonotrode. Dies bedeutet, dass die Kontaktfläche des Ambosses zumindest geringfügig in der gleichen Richtung schwingt, wie die Ultraschallsonotrode, wodurch die Schweißergebnisse bedeutend verbessert werden.With preference, the contact surface of the anvil has a Degree of freedom in the direction of vibration of Ultrasonic sonotrode. This means that the contact surface of the anvil at least slightly in the same direction vibrates as the ultrasonic sonotrode, causing the Welding results are significantly improved.

Bei einer Weiterbildung ist vorgesehen, dass die Kontaktfläche des Ambosses einen Freiheitsgrad senkrecht zur Schwingungsrichtung der Ultraschallsonotrode aufweist. Dabei kann der Amboss über einen weiteren Schwingungserzeuger angeregt werden, so dass dieser senkrecht zur Ultraschallsonotrode schwingt. Auch hierdurch werden die Schweißergebnisse verbessert.In a further development it is provided that the Contact surface of the anvil one degree of freedom perpendicular to the vibration direction of the ultrasonic sonotrode. The anvil can have another Vibrator be stimulated, so this oscillates perpendicular to the ultrasonic sonotrode. Also by this the welding results are improved.

Um die Freiheitsgrade auf einfache Art und Weise erzielen zu können, ist der Amboss erfindungsgemäß frei auskragend gelagert. Bei einem anderen Ausführungsbeispiel ruht der Amboss auf einem Federelement. Dadurch wird die Möglichkeit geschaffen, dass der Amboss nicht absolut starr ist, sondern geringfügig den Bewegungen der Ultraschallsonotrode ausweichen bzw. folgen kann.To achieve the degrees of freedom in a simple way To be able to, the anvil according to the invention is freely cantilevered stored. In another embodiment, the rest Anvil on a spring element. This will be the possibility created that the anvil is not absolutely rigid, but slightly the movements of the ultrasonic sonotrode can dodge or follow.

Erfindungsgemäß weist die Spitze der Ultraschallsonotrode eine Ausbauchung auf. Mittels der Ausbauchung wird die Ultraschallenergie gezielt punktuell in das aus mehreren Lagen bestehende Laminat eingeleitet, so dass zunächst die Schicht aus dem Material mit niedrigem Schmelzpunkt plastifiziert wird. Die Ausbauchung bewirkt eine Verdrängung dieses plastifizierten Materials, so dass anschließend das Material mit höherem Schmelzpunkt plastifiziert wird. Dadurch wird verhindert, dass zu hohe Energien in die Schichten aus dem niedrig schmelzenden Material eingeleitet werden. Es erfolgt lediglich eine Verdrängung dieses Materials, jedoch keine Zerstörung.According to the invention, the tip of the ultrasonic sonotrode a bulge on. By means of the bulge is the Targeted ultrasound energy into several out of several Laying existing laminate initiated so that first the Layer of low melting point material is plasticized. The bulge causes a Displacement of this plasticized material, so that then the material with higher melting point is plasticized. This will prevent too high Energies in the layers from the low-melting Material to be initiated. There is only one Displacement of this material, but no destruction.

Die Erfindung betrifft auch eine erfindungsgemäße Verwendung der Vorrichtung zur Herstellung einer aus einem Beutel bestehenden Verpackung, insbesondere einer Getränkeverpackung. Wie bereits erwähnt, werden durch die Verwendung dieser Vorrichtung derartige Getränkepackungen, insbesondere deren Boden dadurch einfacher und kostengünstiger hergestellt, dass ein Arbeitsschritt, nämlich die Ausstanzung im Randbereich der Seitenränder des Bodens entfallen können.The invention also relates to an inventive Use of the device for producing one of a Bag existing packaging, especially one Beverage Packaging. As already mentioned, by the Use of this device such beverage packages, in particular their soil thereby easier and produced more cost-effectively, that one step, namely the punching in the edge region of the side edges of the Soil can be omitted.

Die Erfindung betrifft ferner ein Verfahren zum Verschweißen von aus mehreren Lagen bestehenden Laminaten bei denen wenigstens zwei Laminatschichten unterschiedlich hohe Schmelzpunkte aufweisen, wobei wenigstens drei Laminatlagen miteinander verschweißt werden und die Laminatlagen derart übereinandergelegt werden, dass die Laminatschichten mit gleich hohen Schmelzpunkten aneinander anliegen, wobei die Laminatschichten mittels Ultraschall miteinander verschweißt werden.The invention further relates to a method for Welding multi-layer laminates where at least two laminate layers are different have high melting points, wherein at least three Laminate layers are welded together and the Laminate layers are superimposed so that the Laminate layers with equally high melting points together abuts, wherein the laminate layers by means of ultrasound be welded together.

Durch die Verwendung von Ultraschall als Schweißenergie, wird, wie bereits oben erwähnt, zunächst das niedrig schmelzende Material plasitifiziert, so dass die beiden aus diesem Material bestehenden Laminatschichten miteinander verbunden werden. Anschließend werden die höher schmelzenden Materialien plastifiziert, so dass die aus diesen Materialien bestehenden Laminatschichten miteinander verbunden werden. Die Laminatlagen sind somit alle miteinander verbunden, und zwar unabhängig von den Schmelzpunkten der Materialien der einzelnen Schichten.By using ultrasound as welding energy, is, as already mentioned above, first low melting material plasitifies, leaving the two off Laminate layers existing with this material get connected. Then the higher plasticized melting materials, so that the Laminate layers of these materials together get connected. The laminate layers are thus all connected, regardless of the Melting points of the materials of the individual layers.

Ein erfindungsgemäßer Verfahrensschritt sieht vor, dass nach dem Plastifizieren des Materials der Schicht mit niedrigem Schmelzpunkt dieses Material solange verdrängt wird, bis der erforderlich Schweißdruck zum Plastifizieren des Materials der Schicht mit höherem Schmelzpunkt vorherrscht. Dies erfolgt in einem Arbeitsgang, da die Schichtdicken extrem gering sind und daher nur sehr wenig Material verdrängt werden muss, so dass der Schweißdruck auch nach dem Verdrängen des plastifizierten Materials im wesentlichen konstant bleibt.An inventive method step provides that after plasticizing the material of the layer with low melting point displaced this material as long until the required welding pressure for plasticizing the material of the higher melting point layer prevails. This is done in one operation, as the Layer thicknesses are extremely low and therefore very little Material must be displaced, so the welding pressure even after the displacement of the plasticized material in the remains essentially constant.

Eine Alternative sieht vor, dass der Schweißdruck während des Schweißvorganges erhöht wird und/oder dass die Sonotrode während des Schweißvorganges zugestellt wird. Hierdurch können die Schweißergebnisse verbessert und/oder gezielt verändert werden.An alternative provides that the welding pressure during the welding process is increased and / or that the Sonotrode is delivered during the welding process. As a result, the welding results can be improved and / or be selectively changed.

Die Erfindung betrifft auch einen Beutel, der mit dem oben genannten Herstellungsverfahren hergestellt worden ist.The invention also relates to a bag associated with the above said production process has been produced.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung ein besonders bevorzugtes Ausführungsbeispiel im einzelnen beschrieben ist. Dabei können die in der Zeichnung dargestellten sowie in der Beschreibung und in den Ansprüchen erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein.Further advantages, features and details of the invention will be apparent from the following description in which with reference to the drawing a particular preferred embodiment described in detail is. It can be shown in the drawing as well mentioned in the description and in the claims Characteristics in each case individually or in any one Combination essential to the invention.

In der Zeichnung zeigen:

Figur 1
eine perspektivische Ansicht eines Getränkebeutels;
Figur 2
eine Ansicht in Richtung des Pfeils II gemäß Figur 1;
Figur 3
einen Faltzuschnitt für einen Getränkebeutel gemäß Figur 1 gemäß dem Stand der Technik;
Figur 4
einen Schnitt IV-IV gemäß Figur 3;
Figur 5
einen Faltzuschnitt für einen Getränkebeutel gemäß Figur 1 gemäß der Erfindung; und
Figur 6
eine schematische Darstellung der erfindungsgemäßen Vorrichtung.
In the drawing show:
FIG. 1
a perspective view of a beverage bag;
FIG. 2
a view in the direction of arrow II in Figure 1;
FIG. 3
a folding blank for a beverage bag according to Figure 1 according to the prior art;
FIG. 4
a section IV-IV according to Figure 3;
FIG. 5
a folding blank for a beverage bag according to Figure 1 according to the invention; and
FIG. 6
a schematic representation of the device according to the invention.

In der Figur 1 ist mit dem Bezugszeichen 10 ein Beutel bezeichnet, mit welchem z.B. Getränke verpackt werden können. Dieser Beutel 10 ist entlang seiner Längsseiten 12 und 14 sowie seiner Oberseite 16 verschweißt. Die Unterseite wird von einem Boden 18 gebildet, der durch Faltung und Ausstülpung des Zuschnitts gebildet wurde.In FIG. 1, the reference numeral 10 is a bag denoted by e.g. Drinks are packed can. This bag 10 is along its longitudinal sides 12th and 14 and its top 16 welded. The Bottom is formed by a bottom 18 passing through Folding and protuberance of the blank was formed.

In der Figur 2 sind mit den Bezugszeichen 20 bis 24 die Schweißnähte bezeichnet, die entlang der Längsseiten 12 und 14 sowie der Oberseite 16 gebildet wurden. Der Innenraum 26 wird im Bereich des Bodens 18 von der mit 28 bezeichneten Linie begrenzt.In the figure 2 are denoted by the reference numerals 20 to 24 the Welded seams along the longitudinal sides 12 and 14 and the top 16 were formed. The interior 26 is in the area of the bottom 18 of the designated 28 Line limited.

Unterhalb dieser Linie 28 sind der Zuschnitt und somit auch die beiden Längsseiten 12 und 14 doppelt gefaltet, wie es in der Figur 3 dargestellt ist.Below this line 28 are the blank and thus also the two long sides 12 and 14 folded twice as it is shown in the figure 3.

In der Figur 4 ist der Bodenbereich des Beutel 10 im Schnitt IV - IV dargestellt, und es sind die drei Schichten 30, 32 und 34 des Laminats 36 dargestellt. Die Schicht 30 besteht aus einem Kunststoff mit einem Schmelzpunkt, der im Bereich von 180°C liegt, z.B. PET (Polyethylenterephthalat). Die die Innenlage bildende Schicht 34 besteht ebenfalls aus Kunststoff, der jedoch einen niedrigeren Schmelzpunkt im Bereich von 110°C bis 120°C aufweist, z.B. PE (Polyethylen). Zwischen den beiden Schichten 30 und 34 liegt eine Schicht 32 aus Aluminium.In the figure 4, the bottom portion of the bag 10 in Section IV - IV shown, and it is the three layers 30, 32 and 34 of the laminate 36. The layer 30 is made of a plastic with a melting point in the Range of 180 ° C, e.g. PET (Polyethylene terephthalate). The inner layer forming Layer 34 is also made of plastic, however a lower melting point in the range of 110 ° C to 120 ° C, e.g. PE (polyethylene). Between the two Layers 30 and 34 is a layer 32 of aluminum.

Durch die doppelte Faltung in Form eines W im Bereich des Bodens 18 wird eine Standfläche für den Beutel 10 erzeugt. Hierfür ist es aber auch erforderlich, dass die Längsseiten 12 und 14 über die Linie 28 hinaus bis zu ihrem unteren Ende, also bis in den Bereich der doppelten Faltung hinein miteinander verschweißt werden. Oberhalb der Linie 28 liegen die beiden innen liegenden Schichten 34 aneinander an und können problemlos miteinander verschweißt werden. Unterhalb der Linie 28 liegt die sich entlang der Längsseite 12 erstreckende Schicht 34 an einer Schicht 34' an, welche nach innen gefaltet ist. Da die beiden Schichten 34 und 34' aus dem gleichen Material bestehen, ist auch hier eine Verschweißung problemlos möglich. Dies gilt auch für den gegenüberliegenden Bereich. Im eingefalteten Abschnitt 38 liegen aber auch zwei Schichten 30' und 30" aneinander an, die zwar aus dem gleichen Material bestehen, dieses Material jedoch einen höheren Schmelzpunkt aufweist, als das Material der Schichten 34 und 34'. Durch den zum Plastifizieren des Materials der Schichten 34 und 34' aufgewandten Wärmeeintrag wird das Material der Schichten 30' und 30" nicht plastifiziert, da der Wärmeeintrag hierfür zu gering ist beziehungsweise die Schmelztemperatur dieses Materials zu hoch ist. Wird der Wärmeeintrag durch weitere Energiezufuhr über die Heizelemente erhöht, wird zwar das Material der beiden Schichten 30' und 30'' plastifiziert, jedoch wird durch diesen hohen Wärmeeintrag das Material der Schichten 34 und 34' zerstört. Es verbietet sich daher ein höherer Wärmeeintrag.Due to the double folding in the form of a W in the area of Floor 18 a footprint for the bag 10 is generated. But for this it is also necessary that the long sides 12 and 14 beyond line 28 to their lower End, so into the area of double folding into it be welded together. Above the line 28 the two inner layers 34 are adjacent to each other and can be easily welded together. Below the line 28 lies along the Longitudinal side 12 extending layer 34 on a layer 34 ' which folded inwards. Because the two layers 34 and 34 'are made of the same material is also here a weld easily possible. this is also valid for the opposite area. In the folded Section 38 but are also two layers 30 'and 30 " to each other, which are made of the same material, however, this material has a higher melting point, as the material of layers 34 and 34 '. By the to Plasticizing the material of layers 34 and 34 ' applied heat input is the material of the layers 30 'and 30 "not plasticized, as the heat input this is too low or the melting temperature this material is too high. Is the heat input through increased energy supply through the heating elements is Although the material of the two layers 30 'and 30' ' plasticized, however, is due to this high heat input the material of the layers 34 and 34 'destroyed. It therefore prohibits a higher heat input.

Dieses Problem wird beim Stand der Technik dadurch gelöst, dass im eingefalteten Abschnitt 38 im Bereich der Schweißnähte 20 und 22 zwei Ausstanzungen 40 und 42 vorgesehen werden, was den Effekt hat, dass beim Zusammenfalten des Zuschnitts im Bereich dieser Ausstanzungen 40 und 42 die Schicht 34 auf einen Abschnitt 44 der gegenüberliegenden Schicht 34 des Laminats 36 zu liegen kommt, so dass die beiden Längsseiten 12 und 14 durch den eingefalteten Abschnitt 38 hindurch direkt miteinander verschweißt werden. Hierfür ist jedoch ein Stanzvorgang für die beiden Ausstanzungen 40 und 42 erforderlich.This problem is solved in the prior art by that in the folded portion 38 in the area of Welds 20 and 22 two punched 40 and 42 be provided, which has the effect that when Fold the blank in the area of this Punches 40 and 42, the layer 34 on a section 44 of the opposite layer 34 of the laminate 36 to lie comes, so that the two long sides 12 and 14 through the folded portion 38 therethrough directly be welded together. However, this is one Punching process for the two punched 40 and 42 required.

Bei der Erfindung wird eine Ultraschallsonotrode 46 verwendet, die an ihrer Spitze eine Ausbauchung 48 aufweist. Mit dieser Ultraschallsonotrode 46 wird zunächst das Material der innen liegenden Schichten 34 und 34' plastifiziert und anschließend verdrängt. Der weitere Energieeintrag plastifiziert nun das Material der Schichten 30' und 30'', sodass diese miteinander verbunden werden, wobei das verdrängte Material der Schichten 34 in 34' nicht zerstört wird. Hierdurch werden in einem Arbeitsgang alle im Bodenbereich aneinander liegenden Schichten 34, 34', 30' und 30'' miteinander verbunden. Einer Ausstanzung bedarf es demnach nicht mehr.In the invention, an ultrasonic sonotrode 46 used, which at its top a bulge 48 having. With this ultrasonic sonotrode 46 is first the material of the inner layers 34 and 34 ' plasticized and then displaced. The further Energy input now plasticizes the material of the layers 30 'and 30' ', so that they are connected to each other, the displaced material of layers 34 in FIG. 34 'is not gets destroyed. As a result, all in one operation in the floor area contiguous layers 34, 34 ', 30' and 30 '' interconnected. A punching is needed therefore not more.

Es hat sich gezeigt, dass die Schweißergebnisse dadurch verbessert werden, wenn der Amboss 50 einen ersten Freiheitsgrad 52 in Schwingungsrichtung 54 der Ultraschallsonotrode 46 und/oder einen zweiten Freiheitsgrad 56 aufweist, was zum Beispiel durch eine elastisch gelagerten Amboss 58 erzielt werden kann.It has been shown that the welding results thereby be improved when the anvil 50 a first Degree of freedom 52 in the direction of vibration 54 of the Ultrasonic sonotrode 46 and / or a second Degree of freedom 56, which for example by a elastically mounted anvil 58 can be achieved.

Die Figur 5 zeigt einen Beutel 10, der nach dem erfindungsgemäßen Verfahren hergestellt wurde, der also in seinem Bereich des Bodens 18 keine Ausstanzungen besitzt, da die Längsseiten 12 und 14 mittels Ultraschall zusammen mit dem eingefalteten Abschnitt 38 innig miteinander verschweißt werden können.FIG. 5 shows a bag 10, which after the inventive method has been prepared, ie in its area of the bottom 18 has no punched out, because the longitudinal sides 12 and 14 together by means of ultrasound with the folded portion 38 intimately with each other can be welded.

Claims (14)

Vorrichtung zum Verschweißen von mehreren Lagen von Laminaten (36), mit einer Ultraschallsonotrode (46) und einem Amboss (50), die zwischen sich wenigstens drei Lagen der Laminate (36) aufnehmen, wobei wenigstens zwei der Laminatschichten (30, 34) unterschiedlich hohe Schmelzpunkte aufweisen, dadurch gekennzeichnet, dass die Vorrichtung eine Ultraschallschweißvorrichtung ist.Apparatus for welding multiple layers of laminates (36) comprising an ultrasonic sonotrode (46) and anvil (50) receiving therebetween at least three layers of the laminates (36), at least two of the laminate layers (30, 34) having different heights Have melting points, characterized in that the device is an ultrasonic welding device. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Amboss (50) elastisch gelagert ist.Apparatus according to claim 1, characterized in that the anvil (50) is elastically mounted. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kontaktfläche des Ambosses (50) einen Freiheitsgrad (52) in Schwingungsrichtung (54) der Ultraschallsonotrode (46) besitzt.Device according to one of the preceding claims, characterized in that the contact surface of the anvil (50) has a degree of freedom (52) in the direction of vibration (54) of the ultrasonic sonotrode (46). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kontaktfläche des Ambosses (50) einen Freiheitsgrad (56) senkrecht zur Schwingungsrichtung (54) der Ultraschallsonotrode (46) aufweist.Device according to one of the preceding claims, characterized in that the contact surface of the anvil (50) has a degree of freedom (56) perpendicular to the direction of vibration (54) of the ultrasonic sonotrode (46). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Amboss (50) frei auskragend gelagert ist.Device according to one of the preceding claims, characterized in that the anvil (50) is cantilevered. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Amboss (50) auf einem Federelement (58) ruht.Device according to one of the preceding claims, characterized in that the anvil (50) rests on a spring element (58). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Spitze der Ultraschallsonotrode (46) eine Ausbauchung (48) aufweist.Device according to one of the preceding claims, characterized in that the tip of the ultrasonic sonotrode (46) has a bulge (48). Verwendung einer Vorrichtung nach einem der vorhergehenden Ansprüchen, zur Herstellung einer aus einem Beutel (10) bestehenden Verpackung, insbesondere einer Getränkeverpackung.Use of a device according to one of preceding claims, for the preparation of a a bag (10) existing packaging, in particular a beverage packaging. Verwendung nach Anspruch 8, dadurch gekennzeichnet, dass mit der Vorrichtung der Boden (18) des Beutels (10) ausstanzungsfrei hergestellt wird.Use according to claim 8, characterized in that with the device of the bottom (18) of the bag (10) is produced punching. Verfahren zum Verschweißen von mehreren Lagen von Laminaten (36), bei denen wenigstens zwei Laminatschichten (30, 34) unterschiedlich hohe Schmelzpunkte aufweisen, wobei wenigstens drei Laminatlagen miteinander verschweißt werden und die Lagen derart übereinander gelagert werden, dass die Schichten (30, 34) mit gleich hohen Schmelzpunkten an einander anliegen, dadurch gekennzeichnet, dass die Laminatschichten (30, 34) mittels Ultraschall miteinander verschweißt werden.Method for welding a plurality of layers of laminates (36), in which at least two laminate layers (30, 34) have different high melting points, wherein at least three laminate layers are welded together and the layers are superimposed such that the layers (30, 34) abut each other with equally high melting points, characterized in that the laminate layers (30, 34) are welded together by means of ultrasound. Verfahren nach Anspruch 10, dadurch gekennzeichnet, dass nach dem Plastifizieren des Materials der Schicht (34) mit niedrigen Schmelzpunkt dieses Material so lange verdrängt wird, bis der erforderliche Schweißdruck zum Plastifizieren des Materials der Schicht (30) mit höheren Schmelzpunkt vorherrscht.A method according to claim 10, characterized in that after plasticizing the material of the low melting point layer (34), this material is displaced until the required welding pressure for plasticizing the material of the higher melting point layer (30) prevails. Verfahren nach Anspruch 10 oder 11, dadurch gekennzeichnet, dass der Schweißdruck während des Schweißvorganges erhöht wird.A method according to claim 10 or 11, characterized in that the welding pressure is increased during the welding operation. Vorrichtung nach einem der Ansprüche 10 bis 12, dadurch gekennzeichnet, dass die Ultraschallsonotrode (46) während des Schweißvorganges zugestellt wird.Device according to one of claims 10 to 12, characterized in that the ultrasonic sonotrode (46) is delivered during the welding operation. Beutel (10) dadurch gekennzeichnet, dass er nach einem Verfahren gemäß der Ansprüche 10 bis 13 hergestellt worden ist.Bag (10), characterized in that it has been produced by a method according to claims 10 to 13.
EP04025254A 2003-11-29 2004-10-23 Apparatus for welding multilayered sheets Withdrawn EP1535723A3 (en)

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DE10356431A DE10356431A1 (en) 2003-11-29 2003-11-29 Device for welding multilayer laminates

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WO2009114797A1 (en) * 2008-03-13 2009-09-17 Alcan Packaging Flexible France Multilayer package with ultrasonic seal and sealing method
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